But it should be that when X is greater than or equal to 25 and less than or equal to 35, the daily running distance of this truck is _ _ _100 km _ _ _;
y = 2x+2(5+x-25)+4(35-x)= 2x+2x-40+ 140-4x = 100km
(3) Where is the distribution center built? What is the shortest distance this truck travels every day?
1, when x is greater than or equal to 0 and less than or equal to 25, y=2x+2(25-x+5)+4(35-x)=200-4x.
Therefore, when x=25, the minimum value of y is 100km.
2. From the fourth blank of the first question, we can know that when X is greater than or equal to 25 and less than or equal to 35, the distance traveled by this truck every day is _ y = _ _ _100 km _ _ _;
Therefore, the distribution center is built in the CD section, and the shortest distance that this truck travels every day is 100km.